Wrench.



0. A. NORDLUND.

WRENCH.

APPLICATION FILED JULY a1, 1912.

1,072,767.v Patented sept.9,1913.

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OSCAR A. NORDLUND, OIF LINDSBORG, KANSAS, ASSIGNOR 0F TWO-THIRDS TO N. P. NELSON, 0F LINDSBORG, KANSAS, ANI) FRANK O. JOHNSON, 0F MCPHERSON, KANSAS.

WRENCH.

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Specification of Letters Patent.

n Patented Sept. 9, 1913.

To all/whom t may concern Be it known that- I, OSCAR A. NORDLUND, a citizen of the United States, residing at Lindsborg, in the county of McPherson and State of Kansas, have invented certain new and useful Improvements in Wrenches, of which the following is a specification.

My invention relates to new and useful improvements in wrenches and more particularly to that yclass of wrenches having a fixed jaw and' a movable jaw mounted for adjustment relative to the fixed jaw, and the object of my invention is to provide a wrench of the above described character in which the movable jaw may be moved to adjusted position with respect to the fixed jaw and which, upon the application of power applied to the handle of the wrench,y

will be further moved toward the fixed jaw, the active faces of the jaws at all times remaining parallel to each other.`

A further object of my invention is to so construct the wrench that upon releasing the handle, the movable jaw will return to adjusted position automatically. ylAnd a still further object of my invention is to provide means for lockingthe movable jaw when swung toward the fixed jaw'by the movement of the handle.

With these and other objects in view, my invention will be more fully described, illustrated in the accompanying drawing, and then kspecifically pointed out in the claimsV which are attached to and form a part of this application. t

In the drawing: Figure 1 is a face view of the wrench; Fig. 2 is a similar view, the handle being shown in section to bettershow the construction v*and operation of the wrench; Fig. 3 is a fragmentary perspective view, showing a lock which may be em ployed in securing the movable jaw in place.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawing by the same reference characters.

The preferred embodiment of my invention includes a shank 10, preferably rectangular in section and provided at Vone end with an integrally formed jaw 1:1 and a sec-V ond shank 12,Y also preferably rectangular in section and provided with an integrally formed jaw 13 and a sleeve 14 vthrough which the lshank 10 is movable and a compound handle including a handle member 15 rigidly secured to the shank 10 and a handle 16 pivotally secured to the same shank. The jaws 11 and 13 are each provided with a detachable platey 17 having a plurality of work engaging teeth 18, the teeth of one plate being inclined oppositely to those of the other, as shown in the draw,- f

formed of heavysheetmetal of suiiicieiitV strength to withstand the strains to which it will be subjected and the metal formingy this handle is bent upon itself longitudinally -in such a manner that the handle is substantially Ushaped in section and that that end of the handle which is secured to the shank 10 by a rivet or other suitable fastening means 19 forms a sleeve 20 for guiding the free end of the shank 12 and maintaining kso the same in engagement against the shank 10. The handle 16 is also formed of heavy sheet metal in the samemanner as the handle member 15 and that end'of the handle member 16 which is pivotally mounted as atv 21 upon the shank 10, is provided with extensions 22 which project over the shank 12, one upon either sidel thereof, and the end portions of each of which are cut away to provide spaced ears 23. `,Spacer blocks 24 are positioned between the spaced ears of one of the extensions 22 and the corresponding ears of the other of said extensions and are secured in place by rivets or other suitable fastening means 25. A worm gear 26 is journaledl by its reduced terminals 27 in suitable bores formed in these spacer `blocks 24 anda thread 28 in this gear meshes of which extends within the pivoted end of Y the handle 16, as shown.

As will be readily seen, if the free e'nd of the handle member 16 is swung toward the handle member 15, the engagement of the worm gear with the teeth of the shank 12 will causethe outward movement ofthe. shank 12 along the shank 10 'to mo-ve thef jaw 13 toward the jaw 11. f

In operation, theJaw 18 justed relative to the kj aw 11 by turning the worm geary 26 in the customarymanner.`

The wrench is then applied to the nut, pipe or other object and employed inl the usualy manner.V The strain thus exerted `upon the handlemember 16 will force the jaw 13 to'- ward the jaw 11 and the greater the strain applied upon the handle and consequently the greater the :torce tending to spread the jaws apart, the greater will be the force acting through the handle andworm gear to move.

the Vjaws together. As soon asthe handle member 16` is released, the spring 30 immediately4 returns it to normal position with respect to the shank 10 moving the jaw 13 out ofengagement with the' work operated u on. f v f pIn Fig. 3 I have shown a modifiedV form of construction embodying an automatic lock for securing the movable handle member 16 in active position to maintain the 'jaw 18 in advanced posit-ion. In this form of wrench, the upper ear 23 adjacent the free end of the handle member 16 is provided with a perforation 31 so ormed'that when the handle member 16 is swung'as far'as possible toward the handle member 15, it will register with the space between adjacent teeth 29y of the shank 12. The `ear 23 se perforated is provided'with a pair of'spaced apart upwardly directed ears 32 and' pivotally mounted intermediate its length be'- tween these ears, is a lever 53, one end of `which carries a downwardly depending pin 3 4 adapted topass through the perforation 31 and engage between-the teeth 29 of the shank and to bear againstl the outerface Vof the shank 12, thereby preventing return movement of the handle member 16. A helical spring 35 is mounted between the extended portion 22 of the handle member 16 Vand the free end of this vlever to automatically force the pin into able jaw in advanced position, but also serves to lock the wrench against any pos'- sible change 1n adjustment, due to uninis roughly adtentional turning of the worm gear 26. The lever 33, being located as shown in Fig. 3, maybe readily depressed against the action of the Yspring' 35 by the thumb ot the operator to release the lock at any desired time.

It will of course be understood that I do not wish to limit Vmyself to the speciic construction of the wrench handle4 or to the specific details of lock mechanism'theretor as various changes in details may be made at any time without departing from the spirit of my invention.

Having thus described the invention, what fis claimed as new is: 1. A wrench including jaw carrying shanks, one 'of which is movable upon the other, said movable shank being provided at its jaw V,carrying end witha sleeve engaging Aabout t-he other shank and upon its outer face with a pluralityof spaced teeth, a

`handle pivoted to the other shank and having extended portions bearing over the sides of the sleeve carrying shank and forming a second sleeve, "and a worm gear journaled in blocks carried by" the free ends of said extensions and engaging the teeth of the shank.

2. A wrench including relatively movable jaw carrying sh'anks, one of which is provided with spaced teeth, ahandle member pivotally secure'dto the other of said shanks and having laterally directed extensions bearing against opposite faces of theshank having teeth and projecting beyond the same, yaworin gear journaled between the projecting portions of said extensions and meshing with the teeth of the shank, and a spring carried bythe handle carrying shank and normally maintainin'gsaid handle at an angle to the shank and the gear at an angle to its shank. Y A wrench including relatively Vmovable jawca'rrying'shanks, one of said Shanks being provided with spaced teeth, a handle swingingly mounted upon the untoothed shank, a worm gear carried by said handle jaw carryingsh'anks, one of said -shanksbeing provided with spacedv teeth, a handle swinginglyV mounted uponv the untoethedV shank, a worm gear carried by said handle and engaging the teeth of the other shank in such a manner that theswinging of the handle uponits shank will' cause the toothed shank to move relatively to the handle carrying j'shank, and means carried by said handle for locking the Shanks against movement, said means including a spring pressed lever Carrying a pin movable into and out of engagement With the teeth of the shank.

5. A Wrench including a shank provided at one end With an integral jaw and at its other end With a Xed handle, the intermediate portion of the shank having teeth formed on one face, a second shank movable along the opposite face of the first and terminating at one end in an integral jaw and at its other end in a pivoted handle, the pivoted end of the handle having an integral housing exf tending over and beyond the first shank, and

a Worm gear rotatably mounted in the housing for rocking engagement with the teeth of the first shank.

In testimony whereof Il affix my signature in presence of two Witnesses.

OSCAR A. NORDLUND. [1.. s] Witnesses:

OSCAR HOLMBERG, JOHN W. WHIILANO.

i Copies of this patent may be obtained for :live cents each, kby addressing the Commissioner of Patents, f' Washington, IJ. C. 

